Regarding URF and OTPS

Here's the thing, I as an OTP or I only play 2 champions, Ryze and Udyr and those are the only champions I have mastery points on. I'm not able to play URF without gaining random mastery points thus making the whole point of only having points with 2 champs useless. I think it's a good idea to add so you can switch off getting mastery points on a selected game mode so OTPS can have fun as well.